EASY
10th Kerala Board
IMPORTANT
Earn 100

See the chemical equation given for the reaction of burning of carbon in oxygen to form carbon dioxide. 

C+O2CO2

How many oxygen atoms combine with one carbon atom?

Important Questions on Gas Laws and Mole Concept

MEDIUM
10th Kerala Board
IMPORTANT

See the chemical equation given for the reaction of burning carbon in oxygen to form carbon dioxide. 

C+O2CO2

How many oxygen atoms combine with 1000 carbon atoms?

EASY
10th Kerala Board
IMPORTANT
How can we calculate the accurate number of atoms?
MEDIUM
10th Kerala Board
IMPORTANT
How many atoms are present in 12 g carbon?
MEDIUM
10th Kerala Board
IMPORTANT
A carbon atom combines with two oxygen atoms. If so, how many oxygen atoms are needed for combining with 6.022×1023 carbon atoms? 
What will be the mass of these atoms?
MEDIUM
10th Kerala Board
IMPORTANT
How many GAM is present in 69 g of sodium?  How many atoms are present in it.
HARD
10th Kerala Board
IMPORTANT

How many GAMs is present the 42 g of nitrogen? Calculate the number of atoms present in the sample? (Atomic mass of N=14)

MEDIUM
10th Kerala Board
IMPORTANT
How many GAMs is present the 80 g oxygen. Calculate the number of atoms present in the sample? (Atomic mass of O=16)
MEDIUM
10th Kerala Board
IMPORTANT

Complete the table given below by finding out the chemical formula and molecular mass.

(Atomic mass : H = 1, O = 16, N = 14)

Element /Compound Chemical formula Molecular mass
Hydrogen H2 1 + 1 = 2
Oxygen O2 _____
Nitrogen N2 _____
Water H2O 1 + 1 +16
Ammonia NH3 _____